Anyone found an alternative Mac Mini outer casing?

Hi! I recently acquired a 100% functional Mac Mini from a recycler, the only catch being that the outer casing has been destroyed, and so the guts of the Mini are exposed, and it's not really in re-saleable condition. I've looked into replacing the casing, but it seems a little silly to spend $50-$100 that people are asking.

Does anyone have thoughts on a practical alternative to Apple's Mini case? I'd prefer something on the practical/discreet side, as opposed to goofy and outrageous.